126 results about "GSM-R" patented technology

The invention provides a vehicle-mounted system and a CBTC system and CTCS system switching control method. The vehicle-mounted system comprises an vehicle-mounted automatic overspeed protection ATP device, a GSM-R station, a WLAN / LTE interface, an automatic driving ATO device, a vehicle-mounted transponder BTM host and an orbital circuit reader TCR, wherein the GSM-R station, the WLAN / LTE interface, the automatic driving ATO device, the vehicle-mounted transponder BTM host and the orbital circuit reader TCR are connected with the vehicle-mounted automatic overspeed protection ATP device; the vehicle-mounted system further comprises a transponder antenna connected with the vehicle-mounted transponder BTM host, and an orbital circuit reader antenna connected with orbital circuit reader TCR. The control method includes the steps that if a second mobile authorization MA2 is larger than a first mobile authorization MA1 under the control of a CBTC control system, the CBTC control system is switched into a CTCS control system; if the first mobile authorization MA1 is larger than the second mobile authorization MA2 under the control of the CTCS control system, the CTCS control system is switched into the CBTC control system. The vehicle-mounted system and the control method overcome the defect that automatic switching of train control systems can not be completed in the prior art, and switching of the control systems is automatically completed when switching conditions are met.

A universal Automatic Train Protection ATP vehicle mounted system and mode control method. The invention mainly uses digital signal processing and safe redundant control technology, designs a safe Protection Automatic control system which can receive many varieties of ground vehicles information transmission modus, realize the combination of the train speed steps control and the first-order speed-distance model curve and realize the generalization of vehicle automatic protection system vehicle mounted equipments. And the ground vehicles information transmission modus consists of analog and digital track circuit, responder, GSM-R transmission, 2.4GHz wireless transmission, etc. the safe protect control is the safe braking model control using the combination of speed steps and first-order speed-distance model curve. The system mainly consists of power module, ground vehicles information transmission reception module, central processing module, recording module and man-machine interface MMI module, etc. The beneficial result is getting a solving program for users on the base of reducing construction costs and intercommunicating transport operation.

This invention discloses a wireless communication system and apparatus for ground to high speed train communication. Unlike other priori arts, the proposed system exploits the train time table, train operating scenarios and GSM-R timing provision so that the train-presence triggered broadband wireless communication can be realized with better performance and less cost. There are provided system architectures and functionality of each apparatus and implementation details.

The invention provides a GSM-R (global system for mobile communications for railway) network interface monitoring system. The system is characterized by comprising an Abis interface monitoring subsystem, an interface-A monitoring subsystem, a PRI (primary rate interface) monitoring subsystem, a comprehensive analysis subsystem and a database, wherein the Abis interface monitoring subsystem is used for collecting, analyzing and processing the network signaling of an Abis interface, the interface-A monitoring subsystem is used for collecting, analyzing and processing the network signaling of an interface A, the PRI monitoring subsystem is used for collecting, analyzing and processing the user data and network signaling of a PRI interface, the comprehensive analysis subsystem is used for performing correlation analysis on the data analyzed and processed by the Abis interface monitoring subsystem, the interface-A monitoring subsystem and the PRI interface monitoring subsystem so as to carry out statistic analysis and fault discrimination on the quality of train control service carried by a GSM-R, and the database is used for storing the processed user data and network signaling. The GSM-R network interface monitoring system can be used for realizing effective and reliable multifunctional application maintenance, such as user tracking, fault location, network performance analysis and the like.

The invention provides an auxiliary train protection system and an auxiliary train protection method based on Beidou navigation. The auxiliary train protection system comprises a GPS (Global Position System) satellite, a Beidou satellite, track positioning equipment arranged on a track, a Beidou-GPS double-module receiver, a vehicular computer, a train control center, a GSM-R (Global System for Mobile Communication-Railways) wireless network for realizing bidirectional communication with a train when the track positioning equipment is normal, wherein the Beidou-GPS double-module receiver and the vehicular computer are arranged on the train; the system can supply more accurate positioning information with the coordination of a track positioning system when the train is in normal operation; the system supplies Beidou-GPS double-module positioning information for the train in the condition that the track positioning equipment loses efficiency, and can communicate with the train by using the Beidou bidirectional communication function without dependence on any ground communication equipment. With the adoption of the auxiliary train protection system, the train is automatically decelerated and even braked in dangerous conditions, so that the normal operation of the train system can be ensured and the auxiliary train protection system is used as a final protection barrier of the train; the security of the train is improved on the basis that the reliability of train positioning information can be ensured.

The invention relates to a vehicle-mounted earthquake emergency handling device for a high-speed railway. The vehicle-mounted earthquake emergency handling device for the high-speed railway comprises a GSM-R communication unit, a catenary outage detection unit and a control unit, wherein the GSM-R communication unit is used for receiving earthquake alarm information, and sending the earthquake alarm information to the control unit, the catenary outage detection unit is used for detecting whether a catenary is in the outage state or not, and sending the detection result to the control unit, and the control unit is connected with an emergency braking loop installed on a train braking system in a hardwired mode, and is used for controlling the emergency braking loop to carry out emergency braking when necessary according to the information sent by the GSM-R communication unit and the catenary outage detection unit. According to the vehicle-mounted earthquake emergency handling device for the high-speed railway, early-warning information sent by an earthquake early-warning system is received through a GSM-R wireless communication system, the power supply state of the catenary is detected in real time in an online mode, the corresponding train control mode is adopted according to the received early-warning information and the catenary outage state, and thus reliability and timeliness of earthquake emergency handling are effectively improved.

The invention relates to the field of wireless communication, in particular to an acquisition and processing system of embedded global system for mobile communications for railway (GSM-R) network interference signals based on multiprocessors. The system comprises a processor, a power module, an analog to digital (AD) data acquisition module, a data and program storage module, a remote data transmission module and a data backup module, the AD data acquisition module coverts collected intermediate frequency analog signals of uplink frequency ranges and downlink frequency ranges of a GSM-R into digital signals to be sent to a digital signal processor (DSP) core in the processor, the DSP core operates and processes to store the digital signals in double data rate 2 (DDR2) chip in the data and program storage module, simultaneously the serial advanced technology attachment (SATA) connector stores the digital signals in a high-capacity rigid disk, the AD data acquisition module starts the intermediate frequency analog signals in an abnormal signal-collected frequency range when data acquisition is abnormal, and the AD data acquisition module is communicated with an upper computer through an Ethernet transceiver.

The present invention belongs to the technology field of safeguard system for railway train, relates to a system of safeguard system for railway realized by adaptive routing wireless. The system is composed of a sensor, a data collecting sender, GSM-R system and FAS. The sensor embedded in safeguard region for railway, constitutes a wireless sensor network by Ad, Hoc way, and monitors information to send to data collecting sender. The data collecting sender processes the collected data to generate warning information after receiving the monitoring information of the sensor, and sends the warning information to train and station logging desk via GSM-R system and FAS system. Related staff and watch keeper can grasp the train and railway travelling environment all-weather and all-directions by the system, response to damages caused by human, formidable natural conditions and all accidents, so as to preferably ensure safeguard.

The invention discloses a hot swappable redundant communication device applied to railway communication, consisting of two power modules which are connected with a power bus. The two railway communication system modules are connected with power bus respectively through top-and-bottom electricity and reset controlling circuit. Two controllers are connected with each other respectively through a net mouth and a serial interface and are respectively and separately connected with the railway communication system module through a GSM-R controlling serial interface; the controller and an I / O interface extension groove are also respectively connected with a peripheral equipment interconnection bus; the I / O interface is also connected with the power bus. The hot swappable redundant communication device has the advantages of the adoption of a compact 3U CompactPCI structure, integration, hot swappable performance and redundant design and realizes the aims of high reliability and miniaturization. All modules of the device can be replaced online without power-off. Furthermore, the redundant design is adopted in crucial modules, such as a GSM-R module in the device, a controller module, a power module, etc. When any function module goes wrong, the function can be automatically switched to a normal module to continue the work, thus guaranteeing the high reliability of an engine communication and ensuring the operation safety of the engine.

The invention discloses a testing platform for a train-ground transmission protocol in a train operation control system and a construction method thereof, and the testing platform comprises a testing system part for integrating testing cases of a space frequency modulation (SFM) protocol block according to service functions of a train-ground transmission EuroRadio protocol and scheduling corresponding train-ground communication processes, and a protocol stack simulation part for collecting protocol layers under the EuroRadio protocol into a general protocol layer and simulating the service functions of the CFM protocol block in a GSM-R network. The testing platform can not only observe the services received by a high layer but also monitor the information exchange of a bottom layer and observe the response of a system to be tested to abnormal behaviors of the bottom layer, thus finishing the conformance testing to the train-ground security transmission protocol in the train operation control system.

The invention discloses a device and a method for a CIR comprehensive diagnosis test. The device comprises an industrial personal computer 3, an interface unit 4, a power source unit 7, a human-computer interaction device and at least two test modules. Each test module is in data connection with the industrial personal computer 3 through a data interface. The interface unit 4 is in data connection with the industrial personal computer 3 through a data interface. The human-computer interaction device is in data connection with the industrial personal computer 3. The method comprises the steps: a test mode and a corresponding test parameter are set; test data are read from a general-purpose tester or the test modules; a standard value required when an index is operated normally is read from a data bank of the industrial personal computer; whether a test value is qualified or not is judged; whether all indexes or functions are tested or not is judged; and the test is finished. According to the device and the method for the CIR comprehensive diagnosis test, the test and a function experiment platform are integrated, the test of electric performance of a (CIR) 450M module, a 800M module, a GSM-R data module and a GSM-R voice module of a comprehensive wireless communication device of a vehicle and an experiment of functions of a train tail, LBJ and TAX are achieved.

The invention provides 450MHz digital-analog compatible locomotive comprehensive wireless communication equipment. The locomotive comprehensive wireless communication equipment comprises an antenna feeder unit respectively connected with a 450MHz communication unit, a GSM-R communication unit and a satellite receiving unit; the 450MHz communication unit, the GSM-R communication unit and the satellite receiving unit are connected with a master control / interface unit; the master control / interface unit is further connected with a recording unit, a power supply unit, a MMI unit and multiple auxiliary function modules. The 450MHz communication unit in the wireless communication equipment provided by the invention has two channel machine control interfaces, the 450MHz digital-analog compatible digital channel machine is adopted, two parallel logic channels are supported on 12.5MHz carrier since the channel machine adopts the TDMA time-division technology, and the use ratio of the frequency spectrum is improved; the inhibition of the environment noise is solved by using the DSP voice processing technology; and the security of the communication is effectively improved by using the digital encryption and authentication at the same time.

The invention relates to a GSM-R (Global System for Mobile Communications-Railway) cluster scheduling service analysis system and an implementing method thereof in the technical field of wireless communication. The analysis of the flow of a railway cluster scheduling service is realized by design of hierarchical modularization. Different service function processing modules are called to carry outqualitative analysis on an GSM-R cluster scheduling service and analyze service interaction conflict by combining interactions between a cluster scheduling communication object and the cluster scheduling service, i.e. dynamic influence factors influencing cluster scheduling communication; and then according to service data which is acquired by monitoring a railway operation field in real time, relative parameters are set and input and qualitative analysis is carried out on GSM-R network service quality characteristics which contain main QoS (Quality of Service) performance indexes of emergency call establishment delay, end-to-end transmission delay, connection failure rate, thuoughput, bit error rate and the like so as to assist railway workers in making a more accurate decision.

The invention discloses a high-speed rail LTE-R locomotive integrated wireless communication device, which includes an integrated main control / interface unit, and the output end of the main control / interface unit is electrically connected with a power supply unit, a recording unit, and an LTE-R communication device. Module, GSM‑R communication module, 450MHz wireless communication module and satellite receiving module, the LTE‑R communication module, GSM‑R communication module, 450MHz wireless communication module and satellite receiving module are all electrically connected to the antenna feeder unit, the The output end of the main control / interface unit is also electrically connected to an MMI unit, and the MMI unit is electrically connected to a printing unit and a display unit. The invention adopts large-scale integrated circuit and embedded software processing technology to construct locomotive comprehensive wireless communication equipment, realizes the integration of three communication modes of LTE-R, GSM-R and 450MHz digital-analog compatibility, and meets the special needs of smooth transition of various communication modes of railways. Based on the aggregated bandwidth technology of LTE, the LTE‑R (TDD) wireless transmission channel is constructed in the 450MHz frequency band to extend the coverage distance of the base station.

The invention discloses a portable temporary speed limit detecting terminal and a maintenance method thereof. A system comprises a portable terminal, a wireless communication module, a railway administration server and an electronic speed limit post. The railway administration server assigns a temporary speed limit maintenance task according to a received application of temporary limit control, relief, detection or modification, and a worker carries the portable terminal and goes to the speed limit area to finish the maintenance task. During maintenance, the portable temporary speed limit detecting terminal communicates wirelessly with the electronic speed limit post in a near field by a radio-frequency module of the portable terminal, and the near field wireless communication comprises reading and writing electronic speed limit post type information; and the portable temporary speed limit detecting terminal communicates wirelessly with the railway administration server in a long distance by a wireless communication module to finish interaction of related data during maintenance. The portable terminal mainly comprises a main control module, the radio-frequency module, a GSM-R module, an IC card recognition unit, a serial module and a power module. In a railway temporary speed limit system adopting the electronic speed limit post, the portable temporary speed limit detecting terminal can play the characteristics of mobility, flexibility, safety and high efficiency.

The invention provides a high-speed railway LTE-R locomotive integrated wireless communication device, wherein an antenna feeder unit of the high-speed railway LTE-R locomotive integrated wireless communication device are respectively in electrical connection and signal connection with a 450 MHz communication unit, an LTE-R communication unit, a GSM-R communication unit and an LBJ communication unit; the 450 MHz communication unit, the LTE-R communication unit, the GSM-R communication unit, the LBJ communication unit, an exchange unit, a recording unit, an interface unit and a power supply unit are respectively electrically connected with a main control unit; and the main control unit is in electrical connection and signal connection with an MMI unit. The high-speed railway LTE-R locomotive integrated wireless communication device realizes integration of three communication modes of LTE-R, GSM-R and 450MHz digital-to-analog compatibility, and is provided with the LBJ communication unitto realize transmission of the 800 MHz data, thereby meeting the special requirement for smooth transition of various communication modes of the railway.

The invention discloses a handover method for a global system for mobile communications for railway (GSM-R) based on train function numbers. The method comprises the following steps of: registering train function numbers, preparing a list of cells along the line, sending pilot signals of switched cells, measuring wirelessly, judging, handing over and canceling the train function numbers. The handover method disclosed by the invention utilizes the characteristic that cells covered on the train line are linear cells, so that handover has fixity, and the train function numbers are combined to perform handover, thereby effectively avoiding the problem of ping-pong handover in communication of mobile users on a high-speed train, and improving the effectiveness of handover.

The invention discloses a controllable train tail system, which comprises a locomotive part, a controllable train tail part and a monitoring and auxiliary maintenance system, wherein when a locomotive brake is operated to reduce pressure, the pressure of an equalizing reservoir and the pressure of a main air pipe are transferred to a train tail driver control box by a locomotive operation monitoring device; the driver control box sends the pressure reduction information to a locomotive main machine part; the locomotive main machine exchanges data with a train tail communication part in a train tail main machine hung at the train tail part through a telecommunication module; the train tail main machine sends related data to the control unit of the train tail main machine; and the control unit exhausts air and reduces pressure through a controllable electromagnet valve according to the pressure reduction information transferred by the locomotive. The universal controllable train tail system is capable of realizing the synchronous controllable brake of the tail part of a heavy-loaded, long and large train and a traction locomotive without global system for mobile communications-railway (GSM-R) network coverage. The controllable train tail system shortens time for braking operation of the train, improves the operation safety of the train and reduces bad influences of train braking on a line.

The invention relates to a system and a method for rail train collision prevention based on a wireless sensor network. The system is provided with a train head device, a train tail device and a rail side device, wherein the rail side device comprises a wireless sensor network, the wireless sensor network consists of communication base stations and network nodes, a rail line is divided into a plurality of equidistant closing areas, the middle point position in each closing area is provided with one communication base station, both sides of each communication base station are respectively provided with the network nodes in equidistant way, each communication base station is provided with a wireless communication module, GSM-R (global system of for mobile communications for railway) wireless equipment, a power supply module and a rail detector, each network node comprises a wireless communication module, a power supply module and a rail detector, the train head device comprises a main controller, a wireless communication module, a power supply module and a braking module, the train tail device comprises a wireless communication module and a power supply module, the output of the power supply module is connected with the wireless communication module, and the train head device and the train tail device are used as movable nodes and are added into the wireless sensor network of the rail side device.

This invention discloses a method for safely transmitting sigal data of wireless locomotives including a wireless transmission channel structure and a safety transmission protocol, in which, the transmitting channels can be two modes of digital transmission broadcast stations and GSM-R: 1, since the data channel structure of the digital transmission broadcast stations is composed of a dynamic networking, a star structure, a mode of frequency alternation between stations and address selection, a transmission way and a communication protocol, it solves the problem of interference of same frequencies, conflict of transmission frames, locking the broadcast stations, signal covering, hand off and communication protocols, 2, based on the structure of the data transmission channel of the GSM-R digital mobile communication channel, the access way of loading and the ground devices and device interfaces, 3, related transmission protocol, 3-D control and signal response confirmation can secure the reliable and safe transmission.

The invention discloses a GSM(Global System for Mobile Communications)-R (Railway) network sound recording system and an acquisition unit thereof. The system comprises the acquisition unit, a processing unit and a storage unit. The acquisition unit is connected with one or more of interfaces including an Abis interface, an A interface and a PRI (Prime Rate Interface); the acquisition unit is used for acquiring voice signals from the connected interface and demodulating the acquired voice signals to obtain raw data; the Abis interface is an interface between a BTS (Base Transceiver Station) and a BSC (Base Station Controller), the A interface is an interface between the BSC and a MSC (Mobile Switching Center), and the PRI is an interface between the MSC and other fixed-line telephone networks; the processing unit is used for executing protocol analysis on the raw data to extract voice data; and the storage unit is used for storing the extracted voice data. The system can record sound for voice signals in a GSM-R private network, and is free from restriction of equipment manufactures.

A high-speed railway GSM-R network dynamic detection method and system mainly solve the dynamic real-time detection and real-time analysis of a high-speed railway GSM-R network state and can realize hidden danger analysis of the sudden anomaly of the GSM-R network. The system integrates a traditional independent instrument test system (instrument, test train) into multiple test circuit board detection modules that are installed separately on high-speed trains operating normally, achieve long-range dynamic testing by using a wireless network so that a maintainer can easily determine and analyzewhether base station parameters is reasonably designed and can timely find out the system problems in a network optimization phas to ensure the normal operation of a GSM-R system. The method and system can combine the detected GSM-R network environment information with train control information, and transmit data to the ground through the GPRS and GSM-R wireless transmission technologies, and realize the real-time dynamic monitoring of the GSM-R network where a running train is located.

The invention discloses a C3 train control system RBC (Radio Block Center) interconnection and intercommunication testing platform in the technical field of road traffic safety measurement and control. The C3 train control system RBC interconnection and intercommunication testing platform is used for measuring whether a function of an RBC is complete and comprises a scene controller, an interlocking message generator, a vehicle-mounted message generator, a centralized traffic control simulator, an adjacent RBC message generator, a temporary speed limit message generator, a speed position generator, an event recorder and a database, wherein the event recorder is respectively connected with the scene controller, the interlocking message generator, the vehicle-mounted message generator, the centralized traffic control simulator, the adjacent RBC message generator, the temporary speed limit message generator, the speed position generator and the database; and the centralized traffic control simulator and the adjacent RBC message generator are respectively connected with the RBC through a GSM-R (GSM-Railway) wireless mode. According to the invention, data records are integrated together from all devices and are introduced into a global clock, thus the precision of a data source is increased, and the possibility is provided for automatic analysis of a testing result.

A receiving device for receiving global system for mobile communications for railways (GSM-R) signals adopts a double-channel input structure, wherein the frequency range of the signals received by an upgoing signal receiving channel is 885MHz-889MHz, the frequency range of the signals received by a downgoing receiving channel is 930MHz-934MHZ, the channels adopt the same structure, and the upgoing signal receiving channel is formed by six modules, namely an upgoing signal receiving antenna, an upgoing signal surface acoustic wave filter module, an upgoing signal low noise amplifier module, an upgoing signal ultra high frequency (UHF) receiver module, an upgoing signal mediate-frequency filter module and an upgoing signal mediate-frequency amplifier module; and a control unit performs channel selection by controlling an UHF receiver. The receiving device for receiving the GSM-R signals reduces manufacture cost, simultaneously can adapt to various complex working environments and provides solving schemes for GSM-R monitoring.

The invention discloses a vehicle-mounted earthquake emergency disposal device of redundant GSM-R communication units. The device is characterized by comprising an antenna, a vehicle-mounted earthquake mainframe and a vehicle-mounted earthquake terminal which are connected in sequence, wherein the vehicle-mounted earthquake mainframe comprises the primary and standby GSM-R communication units arranged in a redundant mode, a brake control unit and a power module; all units in the vehicle-mounted earthquake mainframe send heartbeat information to the vehicle-mounted earthquake terminal in the fixed cycle, and the working states of all the units are monitored by the vehicle-mounted earthquake terminal in real time; during normal working, the primary GSM-R communication unit is responsible for performing data communication with a railway administration center system, and the standby GSM-R communication unit only automatically performs GPRS attachment; when the vehicle-mounted earthquake terminal monitors that the primary GSM-R communication unit state is abnormal, or the primary GSM-R communication unit and the railway administration center system have transmission failure, the vehicle-mounted earthquake terminal is used for indicating to perform switching of the primary and standby GSM-R communication units. By means of the device, the reliability, real time and stability of equipment can be improved, and it is guaranteed that a train can run normally and stably.

The invention provides a GSM-R (global system for mobile communications-railway) base station antenna inclination angle monitoring system, which consists of base station on-tower equipment and ground equipment, wherein the base station on-tower equipment comprises a high-precision inclination angle sensor, a laser distance measuring sensor, a control module and a data communication module; the high-precision inclination angle sensor measures the antenna azimuth angle and the inclination angle; the laser distance measuring sensor measures an included angle of an antenna and a holding rod; the ground equipment comprises a database server, network equipment and a data display terminal; antenna monitoring data is received through a network and is stored onto the server; the data display terminal displays the received antenna monitoring data, warning information and collection log.

The present invention provides a searching method of GSM-R interference source, belonging to the technical field of digital mobile communication special for tdma, since the interference source of GSM-R mainly includes frequencies of uplink 885-889MHz and downlink 930-934MHz used for China mobile, aiming at the characteristics, an Okumura-hata model structure mathematical model widely used for radio wave propagation is used to process search of the interference source. The invention has advantages of simple operation, convenient operation, quick location to the interference source, overcoming the fault of slow search speed of present interference source search; fit for multiple topographic conditions, searching the interference sources of six topographic conditions such as urban districts of small and medium-sized cities, outskirts of small and medium-sized cities, opening environment of small and medium-sized cities, urban districts of big cities, outskirts of big cities and opening environment of big cities.

The invention discloses an online monitoring system of a China train control system (CTCS)-3 grade train control system. The radio block center integrated services digital network (RBC ISDN) server of the ground subsystem of the CTCS-3 grade train control system is connected with a first impedance transformer by a network table through an I<FIX> interface; the first impedance transformer is connected to a global system for mobile communications-railway (GSM-R) network through a coaxial cable; and the monitoring system is connected between the ground subsystem and the GSM-R network through a three-way coupler to acquire the data in the I<FIX> interface of the RBS of the ground subsystem in real time to obtain monitored data, and analyzes, records and stores the acquired monitored data. When the embodiment of the invention is used, the wireless communication data and operation conditions between the RBC and the automatic train protection (ATP) are monitored in real time and displayed synchronously. Meanwhile, the invention also provides the data resolution, query, analysis and export functions of all radio communication layers.

The invention relates to a fast global system for mobile communications for railway (GSM-R) interference identification method and belongs to the field of wireless communication. The method specifically includes taking a signal sequence V composed of N GSM-R sampling data, subjecting the V to fast Fourier transform to obtain a frequency domain data sequence F, diving the F into two sequences of a communication signal sequence S and a bottom noise sequence D by means of a separation threshold value, calculating an average value of the bottom noise sequence D, judging whether a current bottom noise is interfered, subtracting data of the normalization communication signal sequence from corresponding data of a standard signal frequency domain template sequence Std to obtain a result, then subjecting the result to absolute value calculation to obtain a signal differential data sequence Sub 1, calculating a mutual correlation result sequence COV of the Std and the S, subjecting the Std to autocorrelation to obtain an autocorrelation result sequence AUT of the Std, subtracting each datum of the AUT from each datum of the COV to obtain a result, then subjecting the result to absolute value calculation to obtain a sequence Sub 2, and judging whether interference exists according to the Sub 1 and the Sub 2. Input / output (I / O) signal relates to two ways of digital intermediate frequency signals.

The invention discloses a circuit switched (CS) domain based system and method for transmitting GSM-R (Global System for Mobile Communication-Railway) train control data in real time. The system comprises a distributed antenna array, a network-side BTS (Base Transceiver System) and a train locomotive terminal; wherein the distributed antenna array is erected along the railway and used for providing signals of the same fixed frequency for the train locomotive terminal so as to ensure that a CS domain data transmission link of the train locomotive terminal is always in a connection state; the network side BTS is connected with distributed antennae in a wired manner and used for controlling the on / off states of the antennae so as to realize a network side switch function; and the train locomotive terminal is connected with the network side BTS through a wireless transmission link. The invention changes the traditional GSM-R handover strategy to ensure that a train always runs in a cell with a fixed frequency; and a handover function is controlled by one network side BTS so that a ping-pong handover phenomenon is eliminated and the communication stability and the safety reliability ofthe train are obviously enhanced.